kiosk: Add allow_kiosk_app_control_chrome_version policy

chrome/browser/chromeos/policy/proto/chrome_device_policy.proto

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package enterprise_management;
 
@@ skipping 630 matching lines @@
   // This enum corresponds to gfx::Display::Rotation in ui/gfx/display.h.
   enum Rotation {
     ROTATE_0 = 0;
     ROTATE_90 = 1;
     ROTATE_180 = 2;
     ROTATE_270 = 3;
   };
   optional Rotation display_rotation_default = 1;
 }
 
+// Settings that control whether to allow Chrome to be pinned to a specific
+// version according to the auto-launched kiosk app’s requirement.
+message AllowKioskAppControlChromeVersionProto {
+  optional bool allow_kiosk_app_control_chrome_version = 1 [default = false];
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
   optional GuestModeEnabledProto guest_mode_enabled = 3;
   optional OBSOLETE_DeviceProxySettingsProto device_proxy_settings = 4
       [deprecated = true];
   optional CameraEnabledProto camera_enabled = 5;
   optional ShowUserNamesOnSigninProto show_user_names = 6;
   optional DataRoamingEnabledProto data_roaming_enabled = 7;
   optional AllowNewUsersProto allow_new_users = 8;
@@ skipping 24 matching lines @@
   optional AutoCleanupSettigsProto auto_clean_up_settings = 31;
   optional SystemSettingsProto system_settings = 32;
   optional SAMLSettingsProto saml_settings = 33;
   optional RebootOnShutdownProto reboot_on_shutdown = 34;
   optional DeviceHeartbeatSettingsProto device_heartbeat_settings = 35;
   optional ExtensionCacheSizeProto extension_cache_size = 36;
   optional LoginScreenDomainAutoCompleteProto
       login_screen_domain_auto_complete = 37;
   optional DeviceLogUploadSettingsProto device_log_upload_settings = 38;
   optional DisplayRotationDefaultProto display_rotation_default = 39;
+  optional AllowKioskAppControlChromeVersionProto
+      allow_kiosk_app_control_chrome_version = 40;
 }